Worried about his electrolyte levels dropping, Myrtle has Iggy admitted to a local hospital, but unfortunately, Tulipbulb is his nurse. She forgets to thoroughly clean her Iggy's arm with an antiseptic before starting an IV. Within 3 days, she notices that the IV site has become infected. The etiologic agent is most likely because this organism is a(n) pathogen.

A. Campylobacter; fecal
B. Pseudomonas; biofilm
C. S. aureus; opportunistic
D. Salmonella; virulent